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tcg: Optionally sign-extend 32-bit arguments for 64-bit hosts.

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Some hosts (amd64, ia64) have an ABI that ignores the high bits
of the 64-bit register when passing 32-bit arguments.  Others
require the value to be properly sign-extended for the type.
I.e. "int32_t" must be sign-extended and "uint32_t" must be
zero-extended to 64-bits.

To effect this, extend the "sizemask" parameter to tcg_gen_callN
to include the signedness of the type of each parameter.  If the
tcg target requires it, extend each 32-bit argument into a 64-bit
temp and pass that to the function call.

This ABI feature is required by sparc64, ppc64 and s390x.

Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
This commit is contained in:
Richard Henderson 2010-06-14 17:35:27 -07:00 • committed by Aurelien Jarno
parent d2c5efd89f
commit 2bece2c883
8 changed files with 193 additions and 36 deletions
Download patch file Download diff file Expand all files Collapse all files

1
tcg/ppc64/tcg-target.h
View file

@ -106,3 +106,4 @@ enum {
#define TCG_AREG0 TCG_REG_R27
#define TCG_TARGET_HAS_GUEST_BASE
#define TCG_TARGET_EXTEND_ARGS 1

2
tcg/s390/tcg-target.h
View file

@ -87,6 +87,8 @@ enum {
#define TCG_TARGET_STACK_ALIGN 8
#define TCG_TARGET_CALL_STACK_OFFSET 0
#define TCG_TARGET_EXTEND_ARGS 1
enum {
/* Note: must be synced with dyngen-exec.h */
TCG_AREG0 = TCG_REG_R10,

4
tcg/sparc/tcg-target.h
View file

@ -87,6 +87,10 @@ enum {
#define TCG_TARGET_STACK_ALIGN 8
#endif
#ifdef __arch64__
#define TCG_TARGET_EXTEND_ARGS 1
#endif
/* optional instructions */
#define TCG_TARGET_HAS_div_i32
// #define TCG_TARGET_HAS_rot_i32

139
tcg/tcg-op.h
View file

@ -353,6 +353,13 @@ static inline void tcg_gen_movi_i32(TCGv_i32 ret, int32_t arg)
tcg_gen_op2i_i32(INDEX_op_movi_i32, ret, arg);
}
/* A version of dh_sizemask from def-helper.h that doesn't rely on
preprocessor magic. */
static inline int tcg_gen_sizemask(int n, int is_64bit, int is_signed)
{
return (is_64bit << n*2) | (is_signed << (n*2 + 1));
}
/* helper calls */
static inline void tcg_gen_helperN(void *func, int flags, int sizemask,
TCGArg ret, int nargs, TCGArg *args)
@ -369,7 +376,7 @@ static inline void tcg_gen_helperN(void *func, int flags, int sizemask,
and pure, hence the call to tcg_gen_callN() with TCG_CALL_CONST |
TCG_CALL_PURE. This may need to be adjusted if these functions
start to be used with other helpers. */
static inline void tcg_gen_helper32(void *func, TCGv_i32 ret,
static inline void tcg_gen_helper32(void *func, int sizemask, TCGv_i32 ret,
TCGv_i32 a, TCGv_i32 b)
{
TCGv_ptr fn;
@ -377,12 +384,12 @@ static inline void tcg_gen_helper32(void *func, TCGv_i32 ret,
fn = tcg_const_ptr((tcg_target_long)func);
args[0] = GET_TCGV_I32(a);
args[1] = GET_TCGV_I32(b);
tcg_gen_callN(&tcg_ctx, fn, TCG_CALL_CONST | TCG_CALL_PURE,
0, GET_TCGV_I32(ret), 2, args);
tcg_gen_callN(&tcg_ctx, fn, TCG_CALL_CONST | TCG_CALL_PURE, sizemask,
GET_TCGV_I32(ret), 2, args);
tcg_temp_free_ptr(fn);
}
static inline void tcg_gen_helper64(void *func, TCGv_i64 ret,
static inline void tcg_gen_helper64(void *func, int sizemask, TCGv_i64 ret,
TCGv_i64 a, TCGv_i64 b)
{
TCGv_ptr fn;
@ -390,8 +397,8 @@ static inline void tcg_gen_helper64(void *func, TCGv_i64 ret,
fn = tcg_const_ptr((tcg_target_long)func);
args[0] = GET_TCGV_I64(a);
args[1] = GET_TCGV_I64(b);
tcg_gen_callN(&tcg_ctx, fn, TCG_CALL_CONST | TCG_CALL_PURE,
7, GET_TCGV_I64(ret), 2, args);
tcg_gen_callN(&tcg_ctx, fn, TCG_CALL_CONST | TCG_CALL_PURE, sizemask,
GET_TCGV_I64(ret), 2, args);
tcg_temp_free_ptr(fn);
}
@ -692,22 +699,46 @@ static inline void tcg_gen_remu_i32(TCGv_i32 ret, TCGv_i32 arg1, TCGv_i32 arg2)
#else
static inline void tcg_gen_div_i32(TCGv_i32 ret, TCGv_i32 arg1, TCGv_i32 arg2)
{
tcg_gen_helper32(tcg_helper_div_i32, ret, arg1, arg2);
int sizemask = 0;
/* Return value and both arguments are 32-bit and signed. */
sizemask |= tcg_gen_sizemask(0, 0, 1);
sizemask |= tcg_gen_sizemask(1, 0, 1);
sizemask |= tcg_gen_sizemask(2, 0, 1);
tcg_gen_helper32(tcg_helper_div_i32, sizemask, ret, arg1, arg2);
}
static inline void tcg_gen_rem_i32(TCGv_i32 ret, TCGv_i32 arg1, TCGv_i32 arg2)
{
tcg_gen_helper32(tcg_helper_rem_i32, ret, arg1, arg2);
int sizemask = 0;
/* Return value and both arguments are 32-bit and signed. */
sizemask |= tcg_gen_sizemask(0, 0, 1);
sizemask |= tcg_gen_sizemask(1, 0, 1);
sizemask |= tcg_gen_sizemask(2, 0, 1);
tcg_gen_helper32(tcg_helper_rem_i32, sizemask, ret, arg1, arg2);
}
static inline void tcg_gen_divu_i32(TCGv_i32 ret, TCGv_i32 arg1, TCGv_i32 arg2)
{
tcg_gen_helper32(tcg_helper_divu_i32, ret, arg1, arg2);
int sizemask = 0;
/* Return value and both arguments are 32-bit and unsigned. */
sizemask |= tcg_gen_sizemask(0, 0, 0);
sizemask |= tcg_gen_sizemask(1, 0, 0);
sizemask |= tcg_gen_sizemask(2, 0, 0);
tcg_gen_helper32(tcg_helper_divu_i32, ret, arg1, arg2, 0);
}
static inline void tcg_gen_remu_i32(TCGv_i32 ret, TCGv_i32 arg1, TCGv_i32 arg2)
{
tcg_gen_helper32(tcg_helper_remu_i32, ret, arg1, arg2);
int sizemask = 0;
/* Return value and both arguments are 32-bit and unsigned. */
sizemask |= tcg_gen_sizemask(0, 0, 0);
sizemask |= tcg_gen_sizemask(1, 0, 0);
sizemask |= tcg_gen_sizemask(2, 0, 0);
tcg_gen_helper32(tcg_helper_remu_i32, ret, arg1, arg2, 0);
}
#endif
@ -867,7 +898,13 @@ static inline void tcg_gen_xori_i64(TCGv_i64 ret, TCGv_i64 arg1, int64_t arg2)
specific code (x86) */
static inline void tcg_gen_shl_i64(TCGv_i64 ret, TCGv_i64 arg1, TCGv_i64 arg2)
{
tcg_gen_helper64(tcg_helper_shl_i64, ret, arg1, arg2);
int sizemask = 0;
/* Return value and both arguments are 64-bit and signed. */
sizemask |= tcg_gen_sizemask(0, 1, 1);
sizemask |= tcg_gen_sizemask(1, 1, 1);
sizemask |= tcg_gen_sizemask(2, 1, 1);
tcg_gen_helper64(tcg_helper_shl_i64, sizemask, ret, arg1, arg2);
}
static inline void tcg_gen_shli_i64(TCGv_i64 ret, TCGv_i64 arg1, int64_t arg2)
@ -877,7 +914,13 @@ static inline void tcg_gen_shli_i64(TCGv_i64 ret, TCGv_i64 arg1, int64_t arg2)
static inline void tcg_gen_shr_i64(TCGv_i64 ret, TCGv_i64 arg1, TCGv_i64 arg2)
{
tcg_gen_helper64(tcg_helper_shr_i64, ret, arg1, arg2);
int sizemask = 0;
/* Return value and both arguments are 64-bit and signed. */
sizemask |= tcg_gen_sizemask(0, 1, 1);
sizemask |= tcg_gen_sizemask(1, 1, 1);
sizemask |= tcg_gen_sizemask(2, 1, 1);
tcg_gen_helper64(tcg_helper_shr_i64, sizemask, ret, arg1, arg2);
}
static inline void tcg_gen_shri_i64(TCGv_i64 ret, TCGv_i64 arg1, int64_t arg2)
@ -887,7 +930,13 @@ static inline void tcg_gen_shri_i64(TCGv_i64 ret, TCGv_i64 arg1, int64_t arg2)
static inline void tcg_gen_sar_i64(TCGv_i64 ret, TCGv_i64 arg1, TCGv_i64 arg2)
{
tcg_gen_helper64(tcg_helper_sar_i64, ret, arg1, arg2);
int sizemask = 0;
/* Return value and both arguments are 64-bit and signed. */
sizemask |= tcg_gen_sizemask(0, 1, 1);
sizemask |= tcg_gen_sizemask(1, 1, 1);
sizemask |= tcg_gen_sizemask(2, 1, 1);
tcg_gen_helper64(tcg_helper_sar_i64, sizemask, ret, arg1, arg2);
}
static inline void tcg_gen_sari_i64(TCGv_i64 ret, TCGv_i64 arg1, int64_t arg2)
@ -935,22 +984,46 @@ static inline void tcg_gen_mul_i64(TCGv_i64 ret, TCGv_i64 arg1, TCGv_i64 arg2)
static inline void tcg_gen_div_i64(TCGv_i64 ret, TCGv_i64 arg1, TCGv_i64 arg2)
{
tcg_gen_helper64(tcg_helper_div_i64, ret, arg1, arg2);
int sizemask = 0;
/* Return value and both arguments are 64-bit and signed. */
sizemask |= tcg_gen_sizemask(0, 1, 1);
sizemask |= tcg_gen_sizemask(1, 1, 1);
sizemask |= tcg_gen_sizemask(2, 1, 1);
tcg_gen_helper64(tcg_helper_div_i64, sizemask, ret, arg1, arg2);
}
static inline void tcg_gen_rem_i64(TCGv_i64 ret, TCGv_i64 arg1, TCGv_i64 arg2)
{
tcg_gen_helper64(tcg_helper_rem_i64, ret, arg1, arg2);
int sizemask = 0;
/* Return value and both arguments are 64-bit and signed. */
sizemask |= tcg_gen_sizemask(0, 1, 1);
sizemask |= tcg_gen_sizemask(1, 1, 1);
sizemask |= tcg_gen_sizemask(2, 1, 1);
tcg_gen_helper64(tcg_helper_rem_i64, sizemask, ret, arg1, arg2);
}
static inline void tcg_gen_divu_i64(TCGv_i64 ret, TCGv_i64 arg1, TCGv_i64 arg2)
{
tcg_gen_helper64(tcg_helper_divu_i64, ret, arg1, arg2);
int sizemask = 0;
/* Return value and both arguments are 64-bit and unsigned. */
sizemask |= tcg_gen_sizemask(0, 1, 0);
sizemask |= tcg_gen_sizemask(1, 1, 0);
sizemask |= tcg_gen_sizemask(2, 1, 0);
tcg_gen_helper64(tcg_helper_divu_i64, sizemask, ret, arg1, arg2);
}
static inline void tcg_gen_remu_i64(TCGv_i64 ret, TCGv_i64 arg1, TCGv_i64 arg2)
{
tcg_gen_helper64(tcg_helper_remu_i64, ret, arg1, arg2);
int sizemask = 0;
/* Return value and both arguments are 64-bit and unsigned. */
sizemask |= tcg_gen_sizemask(0, 1, 0);
sizemask |= tcg_gen_sizemask(1, 1, 0);
sizemask |= tcg_gen_sizemask(2, 1, 0);
tcg_gen_helper64(tcg_helper_remu_i64, sizemask, ret, arg1, arg2);
}
#else
@ -1212,22 +1285,46 @@ static inline void tcg_gen_remu_i64(TCGv_i64 ret, TCGv_i64 arg1, TCGv_i64 arg2)
#else
static inline void tcg_gen_div_i64(TCGv_i64 ret, TCGv_i64 arg1, TCGv_i64 arg2)
{
tcg_gen_helper64(tcg_helper_div_i64, ret, arg1, arg2);
int sizemask = 0;
/* Return value and both arguments are 64-bit and signed. */
sizemask |= tcg_gen_sizemask(0, 1, 1);
sizemask |= tcg_gen_sizemask(1, 1, 1);
sizemask |= tcg_gen_sizemask(2, 1, 1);
tcg_gen_helper64(tcg_helper_div_i64, sizemask, ret, arg1, arg2);
}
static inline void tcg_gen_rem_i64(TCGv_i64 ret, TCGv_i64 arg1, TCGv_i64 arg2)
{
tcg_gen_helper64(tcg_helper_rem_i64, ret, arg1, arg2);
int sizemask = 0;
/* Return value and both arguments are 64-bit and signed. */
sizemask |= tcg_gen_sizemask(0, 1, 1);
sizemask |= tcg_gen_sizemask(1, 1, 1);
sizemask |= tcg_gen_sizemask(2, 1, 1);
tcg_gen_helper64(tcg_helper_rem_i64, sizemask, ret, arg1, arg2);
}
static inline void tcg_gen_divu_i64(TCGv_i64 ret, TCGv_i64 arg1, TCGv_i64 arg2)
{
tcg_gen_helper64(tcg_helper_divu_i64, ret, arg1, arg2);
int sizemask = 0;
/* Return value and both arguments are 64-bit and unsigned. */
sizemask |= tcg_gen_sizemask(0, 1, 0);
sizemask |= tcg_gen_sizemask(1, 1, 0);
sizemask |= tcg_gen_sizemask(2, 1, 0);
tcg_gen_helper64(tcg_helper_divu_i64, sizemask, ret, arg1, arg2);
}
static inline void tcg_gen_remu_i64(TCGv_i64 ret, TCGv_i64 arg1, TCGv_i64 arg2)
{
tcg_gen_helper64(tcg_helper_remu_i64, ret, arg1, arg2);
int sizemask = 0;
/* Return value and both arguments are 64-bit and unsigned. */
sizemask |= tcg_gen_sizemask(0, 1, 0);
sizemask |= tcg_gen_sizemask(1, 1, 0);
sizemask |= tcg_gen_sizemask(2, 1, 0);
tcg_gen_helper64(tcg_helper_remu_i64, sizemask, ret, arg1, arg2);
}
#endif

41
tcg/tcg.c
View file

@ -560,6 +560,24 @@ void tcg_gen_callN(TCGContext *s, TCGv_ptr func, unsigned int flags,
int real_args;
int nb_rets;
TCGArg *nparam;
#if defined(TCG_TARGET_EXTEND_ARGS) && TCG_TARGET_REG_BITS == 64
for (i = 0; i < nargs; ++i) {
int is_64bit = sizemask & (1 << (i+1)*2);
int is_signed = sizemask & (2 << (i+1)*2);
if (!is_64bit) {
TCGv_i64 temp = tcg_temp_new_i64();
TCGv_i64 orig = MAKE_TCGV_I64(args[i]);
if (is_signed) {
tcg_gen_ext32s_i64(temp, orig);
} else {
tcg_gen_ext32u_i64(temp, orig);
}
args[i] = GET_TCGV_I64(temp);
}
}
#endif /* TCG_TARGET_EXTEND_ARGS */
*gen_opc_ptr++ = INDEX_op_call;
nparam = gen_opparam_ptr++;
#ifdef TCG_TARGET_I386
@ -588,7 +606,8 @@ void tcg_gen_callN(TCGContext *s, TCGv_ptr func, unsigned int flags,
real_args = 0;
for (i = 0; i < nargs; i++) {
#if TCG_TARGET_REG_BITS < 64
if (sizemask & (2 << i)) {
int is_64bit = sizemask & (1 << (i+1)*2);
if (is_64bit) {
#ifdef TCG_TARGET_I386
/* REGPARM case: if the third parameter is 64 bit, it is
allocated on the stack */
@ -622,12 +641,12 @@ void tcg_gen_callN(TCGContext *s, TCGv_ptr func, unsigned int flags,
*gen_opparam_ptr++ = args[i] + 1;
#endif
real_args += 2;
} else
#endif
{
*gen_opparam_ptr++ = args[i];
real_args++;
continue;
}
#endif /* TCG_TARGET_REG_BITS < 64 */
*gen_opparam_ptr++ = args[i];
real_args++;
}
*gen_opparam_ptr++ = GET_TCGV_PTR(func);
@ -637,6 +656,16 @@ void tcg_gen_callN(TCGContext *s, TCGv_ptr func, unsigned int flags,
/* total parameters, needed to go backward in the instruction stream */
*gen_opparam_ptr++ = 1 + nb_rets + real_args + 3;
#if defined(TCG_TARGET_EXTEND_ARGS) && TCG_TARGET_REG_BITS == 64
for (i = 0; i < nargs; ++i) {
int is_64bit = sizemask & (1 << (i+1)*2);
if (!is_64bit) {
TCGv_i64 temp = MAKE_TCGV_I64(args[i]);
tcg_temp_free_i64(temp);
}
}
#endif /* TCG_TARGET_EXTEND_ARGS */
}
#if TCG_TARGET_REG_BITS == 32